My boyfriend and I moved in together with 2 kids each into a small 2 bedroom. We have the kids every other week. It was by no means comfortable, but it served its purpose for us to pay off debt and now we’re moving somewhere bigger. Luckily the kids all get along so on weekends they would “camp” in the living room. Week nights there were bunk beds or we’d put 2 in the bedroom and 2 in the living room depending on bedtime schedules. Personally, I loved it, we saved a lot of money and we found a lot of things to do outside to get us out of the house to where we were only all there for meals or at night. AND, it’s only for half the time. I think you could do it in some place smaller, but it will mean purging some belonging, smaller furniture, and finding more efficient ways to use space. You can do it!